Acute Mountain Sickness: Sick and Tired
There are a few times in my life that
I find myself “sick and tired”. For
example, I am usually sick and tired of my kids leaving the lights on in the
house after every one of them has gone to bed (I have 3 teenagers and a couple
of ‘tween’agers so, go figure). Although
I never imagined I could get sick and tired of skiing, I found myself this
weekend literally sick and tired. For a
while, I thought this was the new me in my forties and that I had to just suck
it up. But then I began to recognize the
symptoms of high altitude pulmonary edema and I realized (thankfully) that this
wasn’t the start of my midlife crisis, but rather a form of acute mountain sickness.
Acute mountain sickness, also known as
altitude sickness or “the altitude bends” is an illness that most commonly occurs
at altitudes above 8000 ft. It is the
physiologic consequence of decreasing consecration of oxygen and lower air
pressure that occurs at higher altitudes.
You would think living at 7200 ft. in Laramie your body would acclimate to
these effects but if you are a skier, climber or otherwise rapidly ascend and
undergo significant physical exertion to get there, you are at risk.
Its symptoms for most are like mine,
mild; however if allowed to progress, it can become very serious or even fatal. Most people will experience fatigue,
headache, mild nausea or loss of appetite but you may also experience
difficulty sleeping, dizziness or vomiting.
When combined with physical exertion, such as downhill skiing, symptoms
may advance to shortness of breath, rapid pulse, a dry cough and chest
tightness. This occurs as fluid
accumulates within the tissues of the lung and eventually you begin coughing up
blood. You may notice this as a metallic
taste to your cough, as I did. As the
disease progresses, fluid accumulates in the tissues of the brain (called
cerebral edema) bringing on worsening headaches, confusion, altered
consciousness and incoordination. The combination
of these fluid shifts at their worst can lead to death.
Treatment
fortunately is very simple: descend to a
lower altitude. Symptoms usually abate
quickly over a few days. For the extreme
problems there are appropriate medications and supportive therapy. The best treatment is of course
prevention. In my case, better physical
conditioning before would have slowed progression. Ascending slowly, sleeping at lower altitudes
or even acclimating a day or two every 2000 ft. during your ascent will
help. If you anticipate having
difficulty, your physician may prescribe you a medication to take during your
trip that will help prevent those fluid shifts.
If you have heart or lung disease you should avoid high altitudes.